Rob and Kris were together in Vegas this weekend to celebrate Rob's birthday and to promote his sock line, Arthur George. The two were at Kardashian Khaos yesterday to pimp out the socks and by the look of things, Kris could teach her son a thing or two about how to properly sell a product.

Rob showed up in a t-shirt and what looked a lot like sweat pants, paired with black athletic shoes. What would Kris do if her daughters turned up for a product appearance dressed this way? We know you own better clothes than this, Rob.

Rob stood there looking a little apprehensive, while pimpmomager busted out her pompons and was ready to do a few high kicks. See below the jump…

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Now THIS is how you whip up excitement. Love her or hate her, Mama J knows how to sell, sell, sell.

TELL US – WHO WOULD YOU RATHER BUY A PRODUCT FROM – FRUMPY ROB OR KICKED-UP KRIS?